Composer install stops during the `postUpdateCmd` process with the following error: > [Symfony\Component\Debug\Exception\FatalThrowableError] > Parse error: syntax error, unexpected ')' This is the line: https://github.com/pattern-lab/patternlab-php-core/blob/7dd6d483c69b4684173247f9673e907621311af4/src/PatternLab/InstallerUtil.php#L353 Further research finds that there's an open PR for this one already - https://github.com/pattern-lab/patternlab-php-core/pull/87